骨架材料遇水膨胀而形成凝胶屏障控制药物溶出的缓控释制剂为
A．亲水凝胶骨架片B．渗透泵片C．磁性微球D．胃漂浮滞留制剂E．溶蚀性骨架片
参考答案：A
Many people are in the park. Some _____ under the tree, _____ are talking at thhee table. [ ]
A. are sitting, others
B. sit, others
C. are sitting, the other
D. sit, the others
Machines that use hydraulic pressure including elevators, dentist chairs, and automobile brakes.
A．exclude
B．excluding
C．include
D．are included
